Global-sales/wai-server/core/baileys/index.js

const {
  makeWASocket,
  WAProto,
  DisconnectReason,
  fetchLatestBaileysVersion,
  makeCacheableSignalKeyStore,
  makeInMemoryStore,
  useMultiFileAuthState,
  downloadMediaMessage
} = require('@whiskeysockets/baileys');
const EventEmitter = require('events');
const { writeFile } = require('fs/promises');

const generateId = require('../../utils/generateId.util');
const NodeCache = require('node-cache');
const P = require('pino');

const logger = P({ timestamp: () => `,"time":"${new Date().toJSON()}"` }, P.destination('./wa-logs.txt'))
logger.level = 'trace'

// external map to store retry counts of messages when decryption/encryption fails
// keep this out of the socket itself, so as to prevent a message decryption/encryption loop across socket restarts
const msgRetryCounterCache = new NodeCache()

// the store maintains the data of the WA connection in memory
// can be written out to a file & read from it
const store = makeInMemoryStore({ logger })
store?.readFromFile('./baileys_store_multi.json')
// save every 10s
setInterval(() => {
  store?.writeToFile('./baileys_store_multi.json')
}, 10_000)

// start a connection
const createWhatsApp = async (phone) => {
  const channelId = generateId()
  const { state, saveCreds } = await useMultiFileAuthState('baileys_auth_info_' + phone + '_' + channelId)
  // fetch latest version of WA Web
  const { version, isLatest } = await fetchLatestBaileysVersion()
  const waVersion = version.join('.') + ', ' + (isLatest ? 'latest' : 'out')
  const myEmitter = new EventEmitter();
  myEmitter.on('connection.open', (p) => {
    console.info('EventEmitter: connection.open')
  });

  const on = (eventName, listener) => {
    myEmitter.on(eventName, listener);
  }

  const sendTextMessage = (whatsAppNo, content) => {
    waSocket.sendMessage(whatsAppNo + '@s.whatsapp.net', { text: content })
  }

  const sendImageMessage = (whatsAppNo, imageUrl) => {
    waSocket.sendMessage(whatsAppNo + '@s.whatsapp.net', {
      image: { url: imageUrl},
    })
  }

  let waSocket = null

  const start = () => {


    return new Promise((resolve, reject) => {
    waSocket = makeWASocket({
      version,
      logger,
      auth: {
        creds: state.creds,
        /** caching makes the store faster to send/recv messages */
        keys: makeCacheableSignalKeyStore(state.keys, logger),
      },
      msgRetryCounterCache,
      generateHighQualityLinkPreview: true,
    })

    // something about the connection changed
      // maybe it closed, or we received all offline message or connection opened
      waSocket.ev.on('connection.update', async (update) => {
        console.log('connection update: ', update)
        const { connection, lastDisconnect, qr } = update
        if(connection === 'close') {
          console.log('链接断开：', lastDisconnect)
          if (lastDisconnect?.error?.output?.statusCode !== DisconnectReason.loggedOut) {
            start()
          } else {
            waSocket.end((error) => console.error('end.error: ', error))
            waSocket.logout((msg) => console.error('logout.msg: ', msg))
            console.log('Connection closed. You are logged out.')
          }
        } else if(connection === 'open') {
          console.info('链接成功')
          myEmitter.emit('connection.open', waSocket);
          await waSocket.sendMessage('8617607730395' + '@s.whatsapp.net', { text: 'OPEN: ' + new Date().toString() })
        } else if(qr !== undefined) {
          // WebSocket 创建成功等待扫码，如果没有扫码会更新 qr
          resolve(qr)
        }
      })

      waSocket.ev.on('messages.upsert', async (upsert) => {
        console.log('收到消息：', JSON.stringify(upsert, undefined, 2))

        if (upsert.type === 'notify') {
          for (const msg of upsert.messages) {

            const messageType = Object.keys(msg.message)[0]

            console.log('messageType', messageType)
            if (messageType === 'imageMessage') {
              // download the message
              const buffer = await downloadMediaMessage(
                msg,
                'buffer',
                { },
                {
                    logger,
                    // pass this so that baileys can request a reupload of media
                    // that has been deleted
                    reuploadRequest: waSocket.updateMediaMessage
                }
              )
              // save to file
              await writeFile('d:/my-download.jpeg', buffer)

              console.log('writeFile', messageType)
            }

            const fromWhatsAppNo = msg.key.remoteJid.split('@')[0]

            if (msg.message?.conversation || msg.message?.extendedTextMessage?.text) {
              const text = msg.message?.conversation || msg.message?.extendedTextMessage?.text

              if (text.indexOf('图片') > -1){
                sendImageMessage(fromWhatsAppNo, 'https://images.asiahighlights.com/allpicture/2022/07/8a7d9ced5936463bb904c82a_cut_750x850_349.webp')
              } else if (text.indexOf('文本') > -1){
                sendTextMessage(fromWhatsAppNo, '文本消息' + new Date().toString())
              }
            }
          }
        }
      })

      // 不绑定不会影响扫码登录
      store?.bind(waSocket.ev)

      // the process function lets you process all events that just occurred
      // efficiently in a batch
      waSocket.ev.process(
        // events is a map for event name => event data
        async (events) => {
          // credentials updated -- save them
          if (events['creds.update']) {
            await saveCreds()
          }
        },
      )
    })
  }

  return {
    createTimestamp: Date.now(),
    status: 'offline',
    version: waVersion,
    channelId : channelId,
    phone: phone,
    start, on,sendTextMessage,sendImageMessage
  }
}

module.exports = {
  createWhatsApp,
};